High carbon stainless steel knives are resistant to … 0.60–0.75% carbon: machine parts, chisels, setscrews; properties include medium hardness with good toughness and shock resistance. In general, steel is referred to as ‘Carbon Steel’ where the main alloying component used is Carbon and when no other elemental requirement is specified such as Chromium, Cobalt, Nickel. If the piece is very hard then it is probably a high carbon tool steel above 100 points carbon. High-carbon steel has approximately 0.60 to 1.00% carbon content.Hardness is higher than the other grades but ductility decreases. Most tool steels are high carbon. " 45 ($12.82/Item) Heat a sample to just over non-magnetic and let cool in free air or gentle breeze. The reasons for this vary with the manufacturer and the type of blade they’re creating. High carbon steel has high strength and hardness (Rockwell C can be up to 60-65 HRC), high elastic limit and fatigue limit after proper heat treatment or cold drawing hardening, and the cutting performance is acceptable, compared to low carbon steel and medium carbon steel, its weldability and cold plastic deformation is the worst. Test the hardness with a file. Low Carbon Steel vs High Carbon Steel The difference between low carbon steel and high carbon steel, as the name implies, stems from the amount of Carbon in the steel. High carbon stainless steel is a metal alloy containing relatively high amounts of carbon. Tool steel refers to a variety of carbon and alloy steels that are particularly well-suited to be made into tools. If it didn't air harden, heat a sample to just over non-magnetic and … 0.76–0.90% carbon: forging dies, hammers, and sledges. RMP Knife Blade Steel - High Carbon Annealed, 1095 Knife Making Billets, 1.5 Inch x 12 Inch x 0.125 Inch, 3 Pack 4.8 out of 5 stars 22 $38.45 $ 38 . A ubiquitous high-end stainless steel that became popular in the 1990s, ATS-34 is a high carbon and chromium stainless steel that contains molybdenum to increase hardness. The amount of carbon can be as much as 1.2% and as low as 0.2%. They are almost always used in a hardened and tempered condition and, as such, are especially wear resistant and capable of holding a sharp cutting edge. This grade of stainless holds a good edge but can be difficult to sharpen because of its high hardness.